diff --git a/clearing-parent/utility-service/src/main/java/ru/spcex/clearing/utility/service/AmatAmafChecker.java b/clearing-parent/utility-service/src/main/java/ru/spcex/clearing/utility/service/AmatAmafChecker.java
index 2c59775ab..9f38f7fbd 100644
--- a/clearing-parent/utility-service/src/main/java/ru/spcex/clearing/utility/service/AmatAmafChecker.java
+++ b/clearing-parent/utility-service/src/main/java/ru/spcex/clearing/utility/service/AmatAmafChecker.java
@@ -100,6 +100,7 @@ public class AmatAmafChecker extends QueueConsumer implements InitializingBean {
         } else {
             log.debug("Selecting {} AM_T and by tradingClearingRegistry and securitySymbol AM_F for his.", specialId);
             long timer = System.currentTimeMillis();
+            specialId = specialId.stream().distinct().collect(Collectors.toList()); // deduplicate
             checkRegistries = new ArrayList<>(specialId.size() * 2);
             for (Long am_tId : specialId) {
                 if (am_tId == null) { // never